id summary reporter owner description type status component version severity resolution keywords cc stage has_patch needs_docs needs_tests needs_better_patch easy ui_ux 10405 quoted class names in foreign key definition causes 'str' object has no attribute '_default_manager' danbrwn nobody "Myself and another discovered the following error with the code shown. In both cases we had quoted strings for reference class. In both cases importing the specific class and then referencing without the quotes solved the problem. I tried through IRC channel to get a resolution. Downloaded code, wiped out site-packages/django dir before running setup, took other suggestions. Nothing worked except removing the quotes as suggested on the django-users group. I am running Debian Etch final. Python 2.5 and Django 1.0.2, Apache2 with mod_python AttributeError: 'str' object has no attribute '_default_manager ------------------ getting this error ------------------------------------------ {{{ MOD_PYTHON ERROR ProcessId: 2637 Interpreter: 'TS1.unassigned-domain' ServerName: 'TS1.unassigned-domain' DocumentRoot: '/var/www/' URI: '/sipprovision/admin' Location: '/sipprovision/' Directory: None Filename: '/var/www/sipprovision/admin' PathInfo: '' Phase: 'PythonHandler' Handler: 'django.core.handlers.modpython' Traceback (most recent call last): File ""/usr/lib/python2.5/site-packages/mod_python/importer.py"", line 1537, in HandlerDispatch default=default_handler, arg=req, silent=hlist.silent) File ""/usr/lib/python2.5/site-packages/mod_python/importer.py"", line 1229, in _process_target result = _execute_target(config, req, object, arg) File ""/usr/lib/python2.5/site-packages/mod_python/importer.py"", line 1128, in _execute_target result = object(arg) File ""/usr/lib/python2.5/site-packages/django/core/handlers/modpython.py"", line 228, in handler return ModPythonHandler()(req) File ""/usr/lib/python2.5/site-packages/django/core/handlers/modpython.py"", line 201, in __call__ response = self.get_response(request) File ""/usr/lib/python2.5/site-packages/django/core/handlers/base.py"", line 67, in get_response response = middleware_method(request) File ""/usr/lib/python2.5/site-packages/django/middleware/common.py"", line 56, in process_request if (not _is_valid_path(request.path_info) and File ""/usr/lib/python2.5/site-packages/django/middleware/common.py"", line 142, in _is_valid_path urlresolvers.resolve(path) File ""/usr/lib/python2.5/site-packages/django/core/urlresolvers.py"", line 246, in resolve return get_resolver(urlconf).resolve(path) File ""/usr/lib/python2.5/site-packages/django/core/urlresolvers.py"", line 179, in resolve for pattern in self.urlconf_module.urlpatterns: File ""/usr/lib/python2.5/site-packages/django/core/urlresolvers.py"", line 198, in _get_urlconf_module self._urlconf_module = __import__(self.urlconf_name, {}, {}, ['']) File ""/var/www/sipprovision/urls.py"", line 2, in from extensions.models import Extension File ""/var/www/sipprovision/extensions/models.py"", line 42, in class ExtensionForm(ModelForm): File ""/usr/lib/python2.5/site-packages/django/forms/models.py"", line 195, in __new__ opts.exclude, formfield_callback) File ""/usr/lib/python2.5/site-packages/django/forms/models.py"", line 162, in fields_for_model formfield = formfield_callback(f) File ""/usr/lib/python2.5/site-packages/django/forms/models.py"", line 177, in lambda f: f.formfield()) File ""/usr/lib/python2.5/site-packages/django/db/models/fields/related.py"", line 694, in formfield 'queryset': self.rel.to._default_manager.complex_filter( AttributeError: 'str' object has no attribute '_default_manager' ------------------------- with this model ------------------------------------- from django.db import models from sipconfig import * from django.forms import ModelForm, fields, TextInput, IntegerField # Create your models here. class Plc(models.Model): name=models.CharField(max_length=30) ip_addr=models.IPAddressField() ip_port=models.IntegerField(default=9600) plc_net=models.IntegerField() plc_node=models.IntegerField() plc_unit=models.IntegerField() def __unicode__(self): return self.name class Admin: pass class VoipGateway(models.Model): name=models.OneToOneField('sipconfig.station') def __unicode__(self): return self.name.dev_name class Admin: pass class Extension(models.Model): PREFIX_CHOICE=( ('1','station'), ('9','lock'), ('8','voicemail')) context=models.ForeignKey('sipconfig.station') plc_sys=models.ForeignKey(Plc) gateway=models.ForeignKey(VoipGateway) word=models.IntegerField() bit=models.IntegerField() prefix=models.CharField(max_length=2,choices=PREFIX_CHOICE) ph_number=models.CharField(max_length=8) def __unicode__(self): return self.context.dev_name +'-'+ self.ph_number class Admin: pass class ExtensionForm(ModelForm): class Meta: model = Extension class ExtAddToContextForm(ModelForm): word_increment=IntegerField(widget=TextInput,initial=0) bit_increment=IntegerField(widget=TextInput,initial=0) phone_increment = IntegerField(widget=TextInput,initial=0) class Meta: model = Extension class PlcForm(ModelForm): class Meta: model=Plc class VoipGatewayForm(ModelForm): class Meta: model=VoipGateway -------------------------------- with this admin.py ------------------------------- from sipprovision.extensions.models import Plc,VoipGateway,Extension from django.contrib import admin class ExtensionAdmin(admin.ModelAdmin): list_display=('context','plc_sys','gateway','word','bit','prefix','ph_number') list_filter=('plc_sys','prefix') class PlcAdmin(admin.ModelAdmin): list_display=('name','ip_addr','ip_port','plc_node','plc_net','plc_unit') admin.site.register(Plc,PlcAdmin) admin.site.register(VoipGateway) admin.site.register(Extension,ExtensionAdmin) ------------------- LINE in related.py returning error is ------------------------ def formfield(self, **kwargs): defaults = { 'form_class': forms.ModelChoiceField, 'queryset': self.rel.to._default_manager.complex_filter( self.rel.limit_choices_to), 'to_field_name': self.rel.field_name, } defaults.update(kwargs) return super(ForeignKey, self).formfield(**defaults) }}}" new Uncategorized 1.0-alpha-2 foreign,key,quoted Unreviewed 0 0 0 0